Carbureter.



J. WILKINSON.

' OARBURETER. APPLICATION FILED AUG.18, 1902.

1,03 99; Patented Sept. 17, 1912.

WlTN ESSI'ES INYE NTOR W I ATTORNEYS 7 head A mixing chamber of thecarbureter, extender "barren snares a JOHN WILKINSON, O1 SYRACUSE, NEWYORK, ASSIGNOR TO H. H.'I B.ANKLIN MANU- FACTURING CQ ANY, OF SYRACUSE,NEW YORK, ACORPORATION OF NEW YORK.

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nuances.

Specification of Letters Patent.

Patented Sept, 17, 1912.

To all whom it may concern I Be it known that 1, Joint WILKINSON, ofSyracuse, 1n the county of Onondaga and State of New York, have inventeda certain new and useful Carbureter, of which the following is aspecification.

My invent-ion has for its object the production of a c'arbureter whichis particularly practical, durable and effective; and to this end, itconsists in the novel combinations and constructions hereinafter setforth and pointed out in the claims.

In describing this invention, reference is had to the accompanyingdrawing in which like characters designate corresponding parts in allthe views.

Figure 1 is a top plan, partly in section, of a. preferable embodimentof my carbu rcter. Fig. 2 is a vertical'sectional view taken on line2-2, Fig. 1.

A represents the casing or main frame of my carbureter, and A theconduit for conducting air thereto. Said casing A is provided with asupply or reservoir-chamber a-' in which the hydrocarbon-is maintainedat a substantially constant level, a conduit (0' for the passage of air,and a feed'duct a connecting the parts a, a. As illustrated, the.r'escrvoir-chamber a is formed in one side of the casing A and isprovided with an open end closed by a suitable detachable the conduit a,which forms the through the casing A at one sideof the chamber a, isformed with a portion of less size or cross-sectional area than theremaining portion of the mixing chamber for causing the [low of airpassing through there duced portion of the mixing chamber to insure thetaking up of the hydrocarbon vapor and contains an integral bridge-pieceA arranged crosswise thereof and formed of less width than the diameterof said conduit a. The duct a extends from the reservoirchamber asubstantially transversely of the axis of the conduit a through thebridgepiece A and the outer surface of the casing A, and is providedwith a lateral unobstructed part or branch extending upwardly within theconduit or mixing chamber a to a point above the level of thehydrocarbon in the chamber a, the exit of this upwardly extending branchopening into the portion of less size of the mixing chamber. Any

desirable plug A closes the end of the duct' a opening through the outersurface of the casing A.

The hydrocarbon maintained at a substantiallyconstant level in thesupply or reservoir-chamber aflows freely through the feed-duct asubject to control by a valve (0 presently described, and rises in theupwardly extending part of said duct to substantially the level of thehydrocarbon in the chamber a. It is therefore apparent that asubstantially constant level of hydrocarbon is present within thevertical part of the feed-duct a in unobstructed communication with theconduit or mixing cham her a, and that the hydrocarbon within the duct(1- is constantly replenished by a reservoir in open communication withsaid duct (1 when the valve a. is open. A constant and ample supply ofhydrocarbon to the mixing chamber is thus provided which augmentsmaterially the efficiency of the carbureter.

In the illustrated embodiment of my in. vention thehydrocarbon ismaintained at a substantially constant level in the supply orreservoir-chamber a by a suitable floatvalve a within said chamber. Anormallyfixed and adjustable valve a is also provided in the duct aintermediate of the chamber a and the vertical part or branch of theducta for contolling or preventing the flow of the hydrocarbon throughsaid duct.

Hydrocarbon is generally admitted to the chamber a by a series ofpassages a which are arranged at an angle to each other, communicate atcorresponding ends with the chamber a, andopen at then-opposite endswith the outer surface of the casing A. In-

let-passages, arranged as described, permit the readconnection to thecasing A of a hydrocarbon inlet pipe extending toward the same in anyone of a number of different directions, and the inlet-passages notconnect-ed to said pipe may be closed by any desirable removable plugsand may be used to facilitate cleaning of the passage to the chamber. a.i

In the preferable construction of my in= vention, the casing A isprovided with a sub stantially square flat surfacea surrounding theinlet of the conduit a, and with substantial equidistant openings a,- attheccrners of the surface ap The conduit A with the conduit a form Theseopenings a are alined with the openseparable from the casing A, it mayobviously be integral therewith, if desired. Said conduit A is hereillustrated as provided with a laterally-extending inletbranch a asubstantially square flat surface a surrounding the exit of said conduitA and normally opposed to the surface a of thecasing A, andsubstantially equidistant openings a at the corners of the surface a.

ings a when the conduit A is arranged in its normal position withlits'branch-a extending to one side, or the front, or the rear of the casingA, and normally receive suitable fastening means, as screws a, alsoreceived in the openings (1'.

' My carbureter is preferably provided with a gravity-seating valve Bwhich controls the passage of the air through the complete conduit a"A.Said valve B normally prevents the entrance of air through the air-inletconduit A to the conduit or mixing chamber a, and its weight is soproportioned to the vacuum required totake up or lift an amount ofhydrocarbon from the feed-duct sufiicient to provide a minimum charge,that the valve will remain upon its seat and pre- "vent the entrance ofair until said vacuum is attained in the mixing chamber. It thus followsthat no air is admitted to the mixing chamber of the ca-rbureter, untila suflicient vacuum is created within such chamher to raise-the valve Bfrom its seat, and that this vacuum determines the weight of the valve Band is suflicient to draw or lift. from the hydrocarbon supplied to themixing chamber, the minimum amount of vapor to unite with the airadmitted by the valve B,v

to form an explosive mixture. Moreover, as the'valve B is seated bygravlty, the operation thereof is always uniform and the passage of theair upon the opening of the valve is unrestricted to a maximum extent,which would not be the case were said valve seated by a spring, sincesprings are more or less ununiform in operation, especially whenvacuumsof different degrees are pro-,, duced in themixing chamber, and alsoinreturningthe valves cause the same to unduly restrict the passage ofthe air. To those skilledin the art it will be apparent that the valve Bhaving its weightproportioned, as'described, 'a'dds materially to theefficiency of'my carbureter, especially when the engine equippedtherewith is throttled or turned by hand, since ordinarily in s'uchevcnt the speed of the air is so slight that suflicient hydrocarbon isnot drawn into the engine by the air to malts an explosive'mixture,whereas in my carbureter no air is admitted to the mixing chamberthereof untih a vacuum is produced 1n this chamber which is suflicientto give such speed tothe air that the hydrocarbon taken up therewithwill make an explosive charge. Although the valveB operates, asdescribed, when but a minimum quantity of air is passing, the resistanceof this valve is so slight that it is of no material eflect when theengine is .not throttled and the normal quantity of air is passing.

In the illustrated embodiment of my in--- vention, the valve B ismovable in the conduit A below the point of communication of thefeed-duct a with the conduit a and between a lug depending from thebridgepiece A and a partition A, which latter extends transversely inthe upper end of the conduit A and is provided with the seat I) for thevalve B. A suitable stemb projects from the valve B. through thepartition A and the wall of the conduit A for guidingsaid valve in itsmovement and permit-. ting hand-manipulation thereof.

The valve B, formed and arranged asdescribed, is particularly eflicient,but it will be understood that I do not limit said valve to thedescribed form or arrangement, and that if desired it may be of greaterweight than is required to insure, before the lifting thereof, theproduction of a vacuum in the mixing chamber sufficient to cause the airpassing when the valve is open, to take up the minimum amount of vaporsuflicient to make an explosive mixture.

' The construction and operation of my carburetor will now be readilyunderstood upon reference to the foregoing description and theaccompanying drawing, and it will be obvious that more or less changemay be made in the component parts of said carbureter without departingfrom the spirit of my invention.

' Having thus described my invention, what I claim is 1. In acarbureter, the combination of a mixing chamber, means for maintaining asubstantially constant level of hydrocarbon within the chamber and forexposing the upper surface of said hydrocarbon within the chamber, aconduit communicating with the mixing chamber for admitting air thereto,and a gravity-seating valve for controlling the passage of air throughthe conduit, said valve having itsweight so proportioned to the vacuumrequired to take up an' amount of hydrocarbon sufiicient to provide aminimum operative charge, that the valve will remain upon its seat untilsaid vacuum is attained in the mixing chamber, substantiallyZ as and forthe purpose described.

2. In a carburetor, the combination of a mixing chamber, a hydrocarbonreservoirchamber, a feed-duct leading from" the latter and communicatingwith the mixing chamber, said feed-duct having substantially the samelevel of hydrocarbon therein as in the reservoir-chamber, and beingnormally open Copies of-. thls patent may be obtained for to permit thepassage of the hydrocarbon therethrough, and having an exit-openingwithin the mixing chamber for exposing within said chamber the uppersurface of the level of'hydrocarbon within the feedduct, a float-valvewithin the reservoirchamber for controlling the admission of thehydrocarbon thereto and maintaining a substantially constant level ofhydrocarbon within the reservoir-chamber, a c onduit communicating withthe mixing chamber for admitting air thereto, and a gravity-seatingvalve for controlling the passage of air through the conduit, said valvehaving its weight so proportioned to the vacuum required to take up anamount of hydrocarbon sufiicient to provide a minimum operative charge,that the valve will remain upon its seat until said vacuum is attainedin the mixing chamber, substantially as and for the purpose set forth. I

3. In a carbure'ter, the combination of a mixing chamber having aportion of less size than the remaining portion of such chamher, afeed-duct having a part thereof vertically disposed within the mixingchamber and opening directly thereinto, the exit of the feed-ductopening into the portion of less size of the mixing chamber and beingnormally open to permit the passage of the hydrocarbon therethrough, ahydrocarbonsupply connected to the feed-duct and in cluding means formaintaining a substantially constant level of hydrocarbon in saidvertically-disposed part of the feed-duct 'be-' low the opening thereininto the mixing chamber, an air-inlet to the mixing chamber buit w theopening of said vertically-disposed part of the feed-duct, and a valvefor closing and controlling the air-inlet, substantially as and for thepurpose described.

4. In a carbureter, the combination of a mixing chamber having a portionof less size than the remaining portion of such chamber, a'feed-ducthaving a part thereof vertically disposed within the mixing chamber andopening at its up er enddirectly thereinto, the exit of the eed-ductopening into the portion of less size of the mixing chamber, and beingnormally open to permit the passage of the hydrcarbon therethrough, ahydrocarbon-supply comprising a reservoirchamber connected to thefeed-duct, and a float-valve within the reservoir-chamber forcontrolling the admission of the hydrocarbon to the reservoir-chamberand thereby maintaining a constant level of the hydrocarbon in thefeed-duct and the reservoirchamber, a normally-fixed valve forcontrolling the flow through the feed-duct arranged ing chamber,substantially asand for the purpose set forth. 7

5. ,In a carbureter, the combination of a casing having a conduit forthe passage of the air and a feed-duct for the hydrocarbon discharginginto the conduit, said casing be ing provided with a substantiallysquare surface surrounding the inlet of the conduit and withsubstantially equidistant openings at the corners of said surface, asecond conduit for communicating with the former conduit having alaterally-extending branch, said second conduit being provided with asubstantially square surface surrounding its exit and opposed to theformer substantially square surface, and with substantially equidistantopenings atthe corners of said surface alined with the former openingswhen the second conduit is arranged with its branch extending to oneside, or the front, or the rear of the frame, and fastening means passedthrough said openings, substantially as and for the purpose set forth.

6. In a casing for a carbureter, the combination of a chamber forreceiving the hydrocarbon, a lurality of inlet-openings arranged at anangle to each other, corresponding ends of the inlet-openings communicatng with the chamber and their opposite ends opening through the outersurface of the frame for permitting the connection to the carbureter ofa hydrocarbon inlet-pipe extending toward the .carbureter JOHNWILKINSON.

Witnesses:

S. DAVIS, F. G. BODELL.

five cents each, by addressing the Commissioner of Patents, Washington,19. 0.

